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1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)最新文献

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Measured surface transfer impedance of multi-pin Micro-D Subminiature and LFH/sup TM/ connector assemblies at frequencies up to 1 GHz 测量频率高达1ghz的多引脚Micro-D Subminiature和LFH/sup TM/连接器组件的表面传输阻抗
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810079
L. Hoeft, J. Knighten, M. Ahmad
{"title":"Measured surface transfer impedance of multi-pin Micro-D Subminiature and LFH/sup TM/ connector assemblies at frequencies up to 1 GHz","authors":"L. Hoeft, J. Knighten, M. Ahmad","doi":"10.1109/ISEMC.1999.810079","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810079","url":null,"abstract":"Candidate connector assemblies were examined for use in high-speed digital interconnects, such as the Fibre Channel protocol. Twelve Micro-D Subminiature connector pair and 6 Low Force Helix (LFH/sup TM/) connector pair with EMI backshells were measured in a triaxial test fixture over 2 frequency ranges-a low frequency range of 1 kHz to 200 MHz and a high frequency range of 300 kHz to 3 GHz. A calibration sample of known impedance was used to correct the high frequency data to mitigate effects of the test fixture parasitics and permit credible transfer impedance data to be obtained up to 1 GHz. The Micro-D connector assemblies from two manufacturers, X and Y, were measured. There was no statistical difference between the Micro-D connector plugs assembled by manufacturers X and Y. At 200 MHz, the average transfer impedance of the Micro-D connectors was 35.4 m/spl Omega/. The sample-to-sample variation of the Micro-D connector pairs was minimal (standard deviation equaled 20% of average). The high frequency transfer impedance increased at a rate less than directly proportional to frequency suggesting that the coupling mechanism was not purely aperture coupling nor contact impedance. The transfer impedance (shielding performance) of the Micro-D connector was sensitive to tightness of the jack screws. The transfer impedance increased dramatically as jack screws were loosened and removed. The LFH/sup TM/ connector exhibited transfer impedances approximately 15 dB lower than the Micro-D connector.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129059616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Magnetostatic cleanliness of the radioisotope thermoelectric generators (RTGs) of Cassini 卡西尼号放射性同位素热电发电机(rtg)的静磁洁净度
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810175
K. Mehlem, P. Narvaez
{"title":"Magnetostatic cleanliness of the radioisotope thermoelectric generators (RTGs) of Cassini","authors":"K. Mehlem, P. Narvaez","doi":"10.1109/ISEMC.1999.810175","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810175","url":null,"abstract":"The Cassini spacecraft, launched in October 1997 to reach Saturn in 2004, carries two magnetometer experiments on a 10-meter boom, one at the mid-section of the boom and the other at the end of the boom. In order to gather valid scientific magnetic field data and avoid electromagnetic interference, the spacecraft had to comply with stringent magnetostatic cleanliness requirements. Amidst the strongest magnetic field perturbations were three radioisotope thermoelectric generators (RTGs), which provide power to the spacecraft's engineering subsystems and science instruments. The RTGs have been compensated efficiently. This paper describes the field-mapping technique, the numerical modeling and the compensation approach used for the RTGs with the goal of minimizing its magnetic field interference with Cassini's DC magnetic field science instruments. A short synthesis of the total spacecraft cleanliness level is also given.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117058537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Joining of two technologies: wire mesh and plastic to produce shielded plastic enclosures 连接两种技术:丝网和塑料，以生产屏蔽塑料外壳
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810081
P. Burton
{"title":"Joining of two technologies: wire mesh and plastic to produce shielded plastic enclosures","authors":"P. Burton","doi":"10.1109/ISEMC.1999.810081","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810081","url":null,"abstract":"This paper covers the development of and the design details required for molding a wire mesh into an injection molded plastic part producing a \"screen room\" effect in the plastics enclosure.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"42 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120932199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Innovative pre-compliance test methodology using ambient cancellation and coherence detection techniques 采用环境抵消和相干检测技术的创新预遵从性测试方法
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810207
P. Parhami, M. Marino, S. Watkins, E. Nakauchi
{"title":"Innovative pre-compliance test methodology using ambient cancellation and coherence detection techniques","authors":"P. Parhami, M. Marino, S. Watkins, E. Nakauchi","doi":"10.1109/ISEMC.1999.810207","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810207","url":null,"abstract":"An innovative pre-compliance test methodology is introduced which enables accurate and rapid radiation emission testing in the presence of strong interfering ambient radiators. The methodology is based on a test technique which uses time and frequency synchronized multi-channel receiver systems to simultaneously record total fields at multiple locations. Advanced signal processing is used to cancel interfering ambient signals, accurately estimate the EUT signal strengths, and relate radiation emission signals to their origins. The presented test methodology virtually eliminates the need for expensive anechoic chambers for pre-compliance testing and EMI troubleshooting. As a result, low cost and automated pre-compliance testing can be effectively conducted in open area test sites (OATS) or inside fully operational plants throughout the product development cycle.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"4 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121232587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Signal and noise measurement techniques using magnetic field probes 使用磁场探头的信号和噪声测量技术
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812967
D.C. Smith
{"title":"Signal and noise measurement techniques using magnetic field probes","authors":"D.C. Smith","doi":"10.1109/ISEMC.1999.812967","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812967","url":null,"abstract":"Magnetic loops have long been used by EMC personnel to \"sniff\" out sources of emissions in circuits and equipment. Additional uses of such probes are presented here that can be very useful to both EMC personnel and circuit designers. Methods are shown for measuring crosstalk and inductive voltage drop along conductors, trace current paths on conducting planes, measure currents, and inject precisely controlled amounts of noise into a circuit. Data is presented in this paper to illustrate usage of some of these methods.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121305377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 47
Input filter design for power factor correction converters operating in discontinuous conduction mode 工作在断续导通模式下的功率因数校正转换器的输入滤波器设计
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812884
V. Grigore, J. Kyyrä, J. Rajamaki
{"title":"Input filter design for power factor correction converters operating in discontinuous conduction mode","authors":"V. Grigore, J. Kyyrä, J. Rajamaki","doi":"10.1109/ISEMC.1999.812884","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812884","url":null,"abstract":"Power factor correction (PFC) converters operating in discontinuous conduction mode (DCM) are very attractive for use in low-cost and low-power applications, due to simpler control when compared with continuous conduction mode (CCM) operation. Design of the EMI input filter for DCM operation has different constraints in certain aspects, when compared with the CCM case. This paper focuses on particularities of the input filter design in the DCM case.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121524404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Extension of the partial element equivalent circuit method to non-rectangular geometries 部分单元等效电路方法在非矩形几何中的推广
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810108
A. Ruehli, G. Antonini, A. Orlandi
{"title":"Extension of the partial element equivalent circuit method to non-rectangular geometries","authors":"A. Ruehli, G. Antonini, A. Orlandi","doi":"10.1109/ISEMC.1999.810108","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810108","url":null,"abstract":"We consider the extension of the partial element equivalent circuit approach to non-rectangular problems. This extension is important for printed circuit boards and other EMI problems where non-orthogonal geometries are present. We give a formulation which is a natural extension of the model for orthogonal conductors. The formulation is chosen in such a way that the advantages of the conventional PEEC models are preserved.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115271670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Complications in correlatability between test techniques due to directional emission patterns 由于定向发射模式导致测试技术之间相关性的复杂性
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810117
D.M. Johnson, M. Hatfield, M.R. Slocum, G. Freyer
{"title":"Complications in correlatability between test techniques due to directional emission patterns","authors":"D.M. Johnson, M. Hatfield, M.R. Slocum, G. Freyer","doi":"10.1109/ISEMC.1999.810117","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810117","url":null,"abstract":"Radiated emissions measurements are commonly performed in open area test sites (OATS), anechoic and semi-anechoic chambers, and GTEM and TEM cells. The OATS test results are typically regarded as the reference standard and all other techniques must be correlatable to the OATS data. The accepted procedures all determine the maximum emissions within some defined solid angle. Reverberation chambers, which measure total radiated power, are not currently accepted in any emission standard. Simple probing of general directional emission patterns can demonstrate what fraction of the total equipment-under-test (EUT) emissions are observed in a particular test technique. In this article, the emissions from two battery-powered laptop computers were investigated using a short wire antenna in the near field.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131654544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Analysis of transmission line equations at high frequency 高频输电线路方程分析
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812892
Gao You-gang, He Wei, Liu Shufang
{"title":"Analysis of transmission line equations at high frequency","authors":"Gao You-gang, He Wei, Liu Shufang","doi":"10.1109/ISEMC.1999.812892","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812892","url":null,"abstract":"New transmission line equations are introduced by applying Maxwell's equations. The conditions of the classical transmission line equations are discussed, which are important for solving the EM problems in the high frequency case.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131227916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automatic radio frequency monitoring measurements 自动射频监测测量
1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810106
P. Raush, J. Kub, E. Gray
{"title":"Automatic radio frequency monitoring measurements","authors":"P. Raush, J. Kub, E. Gray","doi":"10.1109/ISEMC.1999.810106","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810106","url":null,"abstract":"Agencies responsible for monitoring spectrum-emitting systems desire accuracy and efficiency in their measurement techniques. This paper describes six automated measurements that were designed and developed to monitor the radars, navigational aids, HF communications systems, and commercial broadcast systems for the Federal Aviation Administration (FAA).","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123478427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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